Yeah... From what I've seen, the confirmed first-person stories suggest that Appelbaum is probably a huge asshole, but the worst stuff is contained in anonymous accounts filtered through a handful of people, at least one of whom has a weird axe to grind about "plagiarism".
Something feels very off about the whole coordinated effort. This is not a normal way to accuse someone of terrible criminal behavior, by mixing those stories in with mere jerkitude.